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svoid imageSurface_pixelated(ImageSurface imageSurface) {
  imageSurface.setDoubleBuffered(true); // solve flickering when partially obscured
  imageSurface.noAlpha = true;
  imageSurface.interpolationMode = RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR;
  repaint(imageSurface);
}

svoid imageSurface_pixelated(ImageSurface imageSurface, bool pixelated) {
  if (pixelated)
    imageSurface_pixelated(imageSurface);
  else
    imageSurface_unpixelated(imageSurface);
}